Great job expressing Sirius's emotions, and the atmosphere of the prison! The descriptions and all were very chilling. It's a little peak of what poor Sirius's LONG stay in Azkaban must have been like. Every day. Years and years. Wow.
The only part I don't get is the metion of the 'towering, formidable lady' ?
I'm sure it makes sense, I just don't get it. Anywho, great writing!